S235JR steel is a European structural steel grade that falls under the category of low-carbon mild steel. It is primarily characterized by its excellent weldability and machinability, making it a popular choice in various construction and engineering applications.
The primary alloying elements in S235JR include carbon (C), manganese (Mn), and silicon (Si), which contribute to its mechanical properties and overall performance.
S235JR | 1.0038 – Properties According to DIN EN 10025-2
Steel Designation
| Steel Grade | Short Designation | Material Number |
|---|---|---|
| S235JR | – | 1.0038 |
Mechanical Properties
(Transverse direction, according to EN 10025-2)
Yield Strength & Tensile Strength
| Thickness e | Upper Yield Strength ReH (MPa) min. | Tensile Strength Rm (MPa) |
|---|---|---|
| e ≤ 16 mm | 235 | 360 – 510 |
Elongation at Fracture – A80 (Minimum Values)
| Thickness Range | Elongation A80 (%) min. |
|---|---|
| e ≤ 1.0 mm | 15 |
| 1.0 mm < e ≤ 1.5 mm | 16 |
| 1.5 mm < e ≤ 2.0 mm | 17 |
| 2.0 mm < e ≤ 2.5 mm | 18 |
| 2.5 mm < e < 3.0 mm | 19 |
| 3.0 mm ≤ e ≤ 16 mm | 24 |
Elongation at Fracture – A5
| Thickness Range | Elongation A5 (%) min. |
|---|---|
| 3.0 mm ≤ e ≤ 16 mm | 24 |
Chemical Composition
(Heat Analysis, Maximum Values According to EN 10025-2)
| Element | C | Si | Mn | P | S | N | Cu |
|---|---|---|---|---|---|---|---|
| % max. | 0.17 | – | 1.40 | 0.035 | 0.035 | 0.012 | 0.55 |
Technical Interpretation
S235JR is a non-alloy structural steel with a minimum yield strength of 235 MPa, suitable for general structural applications.
The high elongation values, especially at higher thicknesses, indicate good ductility and formability.
Low carbon and controlled sulfur/phosphorus content ensure excellent weldability without the need for preheating.
The material number 1.0038 is commonly used in European technical drawings and procurement documents.
